No Feedback from Cell Cs Back office,No resolution

April 2014 I foolishly took out a cell C My Gig 200, upon trying to use the product I found that that I had virtually no signal. After trying my best to use the product I reported the issue with Cell C technical dept Within a week they dispatched a technician and assessed that the 3G coverage is limited in my area. I later received a sms that Cell C would not be doing any upgrades in my area any time soon (SD247542). Cell C did not make any offers to compensate me even though they knew my location before taking my money. In April of this year I see they EXPIRED all of my remaining data, when their adverti*****ts did not display this last year (only now is this shown). I have tried, since the beginning of this month (***) to try and get cell c to attend to my request for a refund, but nobody is getting back to me. I tried in April of this year to get this resolved and only ended up in empty promises and my query being closed (***). I spoke with a call center agent, supervisor, manager and then finally the back of office person who seems to of cut the call on me and never called me back. Great service cell c. What recourse do we as customers have, a banner